YUANTUO 9V Battery Memory Saver for OBD-II 16‑Pin — Keeps Radio & ECU Settings During Battery Service

YUANTUO 9V Battery Powered Memory Saver plugs into any OBD-II 16‑pin port to keep your vehicle's electronic settings intact while the main battery is disconnected.

When you need to replace or disconnect a car battery, losing radio presets, ECU settings, or adaptive memory can mean wasted time and frustrating reprogramming. This compact, plug‑and‑play memory protector uses a standard 9V battery to supply low current through an OBD-II connector so vehicle modules retain stored information during maintenance. It’s designed for broad compatibility with cars that have the standard 16‑pin OBD-II socket and aims to make battery service quicker and cleaner.

How do I use the YUANTUO memory saver during a battery swap?

Using the device is straightforward: insert a 9V battery (sold separately), connect it to the memory saver, then plug the OBD-II connector into your vehicle’s 16‑pin port before removing the main battery. The unit supplies stable backup power so electronics remain powered while work proceeds.

• Insert a fresh 9V battery into the memory saver lead.
• Locate the vehicle’s OBD-II 16‑pin connector (usually under the dash).
• Plug the device in before disconnecting the car battery, then remove the main battery safely.

Will this keep all my car data and settings safe?

The memory saver is intended to maintain essential module memory and settings—such as radio presets, clock, and some ECU adaptive values—while the battery is removed. It’s not a full diagnostic tool but is effective at preventing lost configurations that often require reprogramming.

• Protects radios, clocks, and many ECU memory values.
• Prevents time-consuming resets or reprogramming after battery replacement.
• Not a substitute for OEM programming tools for advanced module reflashes.

Which vehicles will this OBD-II connector work with?

The product is built to fit any vehicle equipped with a standard OBD-II 16‑pin interface. That covers most cars and light trucks sold since the late 1990s; confirm your vehicle has the 16‑pin connector before purchase.

• Compatible with vehicles featuring the standard OBD-II 16‑pin port.
• Suitable for many makes and models across regions where OBD-II is used.
• Works independently of vehicle brand—check physical port location beforehand.

What are the practical advantages for mechanics and DIYers?

This tiny device saves time during routine battery service, reduces the risk of accidentally clearing stored values, and protects sensitive electronic systems by providing a controlled backup voltage. It’s lightweight and portable, making it a useful addition to a technician’s kit or a DIY toolkit.

• Saves shop and owner time by avoiding reprogramming chores.
• Makes battery swaps safer for electronic modules by providing stable backup power.
• Compact, durable construction for repeated use in garage environments.

Who is this for: The YUANTUO 9V OBD-II Memory Saver is aimed at vehicle owners, professional mechanics, and mobile technicians who frequently replace batteries or perform electrical work and want to preserve stored vehicle settings without diagnostic equipment. It’s ideal for anyone who wants a fast, simple way to maintain electronic memory during battery maintenance—just remember the package does not include the 9V battery.